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3803433 |
PERMANENT MAGNET ROTOR SYNCHRONOUS MOTOR
A synchronous self-starting timer motor having a disc shaped rotor with an annular ring of permanently magentized poles about the pheriphery therof. The magnetized poles are of alternately opposite...
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3798572 |
TUNABLE CRYSTAL OSCILLATOR
A tunable crystal oscillator having a crystal operated in series resonance and having an oscillating frequency which is detunable in a given frequency range close to the natural frequency of the...
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3794760 |
HORIZONTAL SYNCHRONIZING DEVICE FOR TELEVISION RECEIVERS
A horizontal synchronizing device for television receivers, wherein a horizontal synchronizing signal is imparted to an oscillator which is frequency-controlled by means of a mechanical resonator,...
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3792577 |
QUARTZ CRYSTAL WRIST WATCH
A wrist watch having a quartz crystal time standard oscillator driving a pulse shaper circuit including counters for reducing the frequency of the signal from said oscillator to a time-keeping...
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3791133 |
CRYSTAL OSCILLATOR TYPE SMALL TIMEPIECE
A small electronic timepiece is disclosed, especially a watch, comprising a piezo-electric crystal oscillator as a time base means thereof, a frequency divider for dividing the oscillation fed from...
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3792377 |
TEMPERATURE COMPENSATED QUARTZ OSCILLATOR CIRCUIT
A quartz oscillator having a four-terminal quartz vibrator, two of the four terminals being connected with a compensating device for compensating the temperature coefficient of the quartz vibrator...
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3784930 |
AMPLITUDE STABILIZED OSCILLATOR
An electrometer apparatus having an amplitude stabilized oscillator circuit with an electromechanical resonant transducer connected to the input of the oscillator active stage. The transducer has...
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3780219 |
SIGNAL PROCESSING CIRCUIT
A color television receiver has an integrated circuit burst amplifier and hue control, voltage controlled subcarrier oscillator, APC detector and ACC detector. Simplified filtering and adjustment...
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3778648 |
PIEZOELECTRIC TRANSFORMERS
In a driving circuit for driving a piezoelectric transformer including a piezoelectric member provided with a pair of driving electrodes and an output electrode, there are provided a transformer...
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3775697 |
ELECTRONIC CIRCUIT FOR A QUARTZ CRYSTAL WATCH
There is disclosed an electronic circuit for a quartz crystal wrist watch including a quartz crystal oscillator, bistable flip-flop frequency divider stages and a motor driver circuit. A common...
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3767946 |
JUNCTION FIELD EFFECT TRANSISTOR DEVICE FOR REPLACING A PENTODE
A field-effect transistor device for replacing a pentode includes four terminals which correspond to a cathode terminal, a control grid terminal, a screen grid terminal and a plate terminal of the...
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3763440 |
TEMPERATURE COMPENSATED SIGNAL GENERATION CIRCUIT EMPLOYING A SINGLE TEMPERATURE SENSING ELEMENT
A signal generation circuit includes a crystal oscillator for generating an oscillatory signal and a temperature compensation circuit coupled to the oscillator for controlling the capacitance...
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3763439 |
VOLTAGE CONTROLLED OSCILLATOR FOR INTEGRATED CIRCUIT FABRICATION
A voltage controlled oscillator is described particularly suited for APC and AFC applications and having a wide phase shift control range. The oscillator is adapted for IC fabrication with a...
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3761909 |
INTRUSION ALARM SYSTEM
An intrusion alarm system includes separate transmitting and receiving transducers. The system detects the presence of an intruder in a protected area by generating carrier waves in the area and...
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3761840 |
VOLTAGE CONTROLLABLE CRYSTAL DIGITAL CLOCK
A TTL (transistor-transistor-logic) compatible voltage controllable crystal digital clock having a relatively wide linear frequency control range with relatively small control voltage range. A...
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3760584 |
INTEGRATED CIRCUIT SOLID STATE WATCH
Disclosed is a solid state electronic wristwatch with no moving parts. A crystal oscillator supplies a timing signal through a binary divider and display actuator to an electro-optical display in...
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3757510 |
HIGH FREQUENCY ELECTRONIC WATCH WITH LOW POWER DISSIPATION
An extremely thin and small electronic watch made possible by a crystal oscillating in the megahertz range and coupled to the display of the watch through two frequency dividers having basically...
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3757245 |
TEMPERATURE COMPENSATED FIELD EFFECT TRANSISTOR CRYSTAL OSCILLATOR
A temperature-compensated field-effect transistor crystal oscillator includes a first impedance with a capacitive component having a negative temperature coefficient in a feedback loop of the...
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3756013 |
SOLID STATE WATCH
Disclosed is a solid state watch which requires no moving parts for timekeeping and display. The watch comprises a crystal controlled oscillator connected through an intergrated circuit binary...
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3754152 |
INCREMENTALLY ADJUSTABLE CAPACITOR UNIT FOR TUNING A CRYSTAL-CONTROLLED OSCILLATOR
A capacitor unit adapted to adjust the frequency of a crystal-controlled oscillator in incremental steps, the oscillator serving as a frequency standard for an electronic timepiece. The unit is...
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3745760 |
ELECTRONIC SWITCH FOR TIMEPIECES
An electronic switch to provide a long storage life for the battery used in timepieces such as quartz watches is disclosed. The switch includes a transistor connected between the oscillator divider...
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3746897 |
ULTRASONIC MULTI-FREQUENCY SYSTEM
The system includes converter means for transforming regular current; i.e.., 60 cycles per second, to electrical current at different frequencies in the sonic and/or ultrasonic range for driving...
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3747023 |
VOLTAGE CONTROLLED CRYSTAL OSCILLATOR
A voltage-controlled crystal oscillator circuit for use in various kinds of electronic apparatus is shown. The preferred embodiment consists of voltage sensitive capacitor, as a varactor, in...
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3745485 |
ELECTROACOUSTIC SURFACE WAVE TIMING SYSTEM
Two or more circulating waves are maintained in a nondispersive electroacoustic surface wave delay medium. The periodicity or circulating frequency of each wave is related respectively to a...
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3743868 |
DRIVING APPARATUS FOR PIEZOELECTRIC CERAMIC ELEMENTS
In apparatus for driving a piezoelectric ceramic element by applying a driving voltage across a pair of driving electrodes of the ceramic element, there are provided a phase detector connected to...
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3743764 |
ELECTRONIC PHASE SHIFTING APPARATUS
An electronic phase shift circuit suitable for construction in integrated circuit form as a tint control or as an automatic frequency and phase control for a color oscillator, or the like. In the...
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3743968 |
COLLECTOR-BASE COUPLED DOUBLE TRANSISTOR CRYSTAL OSCILLATOR
The piezoelectric crystal oscillators are of a small size and may oscillate with fundamental frequencies and overtones of at least eleventh orders without using inductances.
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3742492 |
TRANSDUCER DRIVE CIRCUIT AND SIGNAL GENERATOR
A transducer such as a piezoelectric element forms part of the diaphragm of a speaker in a sonic signal generator. A timing circuit and the piezoelectric transducer element are coupled to a level...
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3740681 |
VOLTAGE CONTROLLED CRYSTAL OSCILLATOR
A crystal oscillator frequency signal and a shift frequency signal are selectively combined in a PUT and TAKE circuit comprising digital dividers and logic gating. An output signal from a ramp...
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3739299 |
ADJUSTABLE PIEZOELECTRIC TUNABLE OSCILLATOR FOR ACOUSTIC SIGNAL GENERATING SYSTEM
An acoustic signal transmitter includes an electronic oscillator capable of developing a signal of a given acoustic frequency within a range of such frequencies. A piezoelectric transducer forms...
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3737805 |
CRYSTAL OSCILLATOR WITH STEPPED VARIABLE CAPACITOR
A miniature variable condenser for and coupled to a quartz crystal vibrator including sandwich type evaporated capacitor sections of a plurality of capacitance, means being provided for selectively...
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3737746 |
QUARTZ CRYSTAL CONTROLLED STEPPER MOTOR
A battery powered self-starting stepper motor driven by pulses of alternating polarity derived from a quartz crystal oscillator via a divider circuit. The output of the quartz crystal oscillator is...
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3736523 |
FAILURE DETECTION CIRCUIT FOR ULTRASONIC APPARATUS
A failure detection circuit for a power oscillator driven by a set of transistors which are switched to provide a square wave drive voltage to the oscillator comprises a narrow band pass filter and...
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3731230 |
BROADBAND CIRCUIT FOR MINIMIZING THE EFFECTS OF CRYSTAL SHUNT CAPACITANCE
A crystal controlled oscillator circuit having broadband circuitry for balancing out the effects of the static shunt capacitance of a crystal. A broadband phase inverting network is connected...
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3728855 |
CRYSTAL CONTROLLED MOVEMENT WITH FREQUENCY DIVIDING CIRCUITRY
Timekeeping apparatus in which a precision crystal oscillator is used as a frequency reference, the output of which is divided in frequency by a multi-stage binary divider before being converted to...
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3728480 |
TELEVISION GAMING AND TRAINING APPARATUS
The present invention pertains to an apparatus and method, in conjunction with standard monochrome and color television receivers, for the generation, display, manipulation, and use of symbols or...
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3725822 |
PHASE SHIFT OSCILLATORS USING INSULATED-GATE FIELD-EFFECT TRANSISTORS
An oscillator comprising a complementary symmetry field effect transistor inverter, and a feedback loop from the output terminal to the input terminal of the inverter. Frequency stabilization is...
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3723899 |
MULTIPLE OSCILLATOR ISOLATION CIRCUIT
A multiple oscillator isolation circuit for driving one of such oscillators at a time, switchably connecting the output of said driven oscillator to a common buss, and isolating such driven...
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3721084 |
SOLID STATE WATCH INCORPORATING LARGE-SCALE INTEGRATED CIRCUITS
Disclosed is a solid state wristwatch having no moving parts. A crystal oscillator supplies a timing signal through a binary divider and display actuator to an electro-optical display in the form...
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3719838 |
TEMPERATURE COMPENSATING DIGITAL SYSTEM FOR ELECTROMECHANICAL RESONATORS
A temperature-compensating system for piezoelectric crystal oscillators and other electromechanical resonators whose operating frequency varies as a function of ambient temperature. The system...
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3712045 |
QUARTZ CRYSTAL WATCH
A quartz crystal watch comprising a quartz crystal oscillator for generating relatively high frequency signals, a frequency divider circuit for reducing and converting the frequency of the...
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3713045 |
OSCILLATOR WITH A PIEZO-MECHANICAL VIBRATOR
Improved oscillator including an oscillator element, amplifier, amplitude limiter and tuned output circuit. A feedback path is provided between the tuned output circuit and the oscillator element....
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3708701 |
APPARATUS FOR DRIVING PIEZOELECTRIC TRANSFORMERS
In apparatus for driving a transducer including a pair of electrodes there are provided a resonance circuit comprised by an inductance and a capacitance connected in parallel and connected across...
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3699476 |
CRYSTAL CONTROLLED DIGITAL LOGIC GATE OSCILLATOR
A high frequency crystal-controlled oscillator circuit which utilizes a digital logic gate in an amplifier mode of operation and produces sine or square wave output signals.
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3697890 |
WIDE DEVIATION VOLTAGE CONTROLLED CRYSTAL OSCILLATOR WITH TEMPERATURE COMPENSATION
A wide deviation voltage controlled oscillator having a tunable crystal fer utilizing a negative temperature coefficient coupling capacitance to produce a linear frequency change with any...
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3697983 |
ALERTING DEVICES, OSCILLATORS AND FLIP FLOPS
Sonic alerting devices of the type controlled by natural frequency of the transducer have efficient drives and can omit capacitors by employing two transistors connected in series configuration...
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3693105 |
ACTIVE TUNED CIRCUIT
Active tuned circuit configurations particularly suitable for microelectronic construction as filters, amplifiers, and oscillators for operation near the F t of the transistors employed. A high Q,...
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3691475 |
VOLTAGE CONTROLLED OSCILLATOR
An oscillation circuit loop includes two phase shifters for advancing and delaying the phase of an input signal respectively, an adder for obtaining the vector sum of the output signals of these...
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3684981 |
MONOLITHIC INTEGRABLE CRYSTAL OSCILLATOR CIRCUIT
This is a monolithic integrable crystal oscillator circuit wherein the quartz is connected between the emitter of two transistors. The emitter resistors are replaced by transistors connected as...
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3683213 |
MICRORESONATOR OF TUNING FORK CONFIGURATION
A piezoelectric or ferroelectric microresonator of tuning fork configuration has an overall length of from about 100 mils to 500 mils, and a width of from about 15 mils to about 50 mils. In a...
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